Answer:
squeezing syringes contain gas
KNO3=40+14+16*3=210 no. of moles=given mass/molarmass. n=m/M= no. of moles=given mass/molar mass =549/210 =2.61
Answer:
Standing still not movable
Explanation:
Meaning that it has stayed the same
First we will calculate the number of moles of Iron:
![n = \frac{m}{M} ](https://tex.z-dn.net/?f=n%20%3D%20%20%5Cfrac%7Bm%7D%7BM%7D%0A)
, where n is the number of moles, m is the mass of iron in the reaction and M is the Atomic weight.
![n= \frac{84.9}{55.845} = 1,52](https://tex.z-dn.net/?f=n%3D%20%5Cfrac%7B84.9%7D%7B55.845%7D%20%3D%201%2C52)
moles of Iron.
The same number of moles of Oxygen will take part in the reaction.
So
![1,52= \frac{mOxygen}{32}](https://tex.z-dn.net/?f=1%2C52%3D%20%5Cfrac%7BmOxygen%7D%7B32%7D%20)
where 32 is the Atomical Weight of Oxygen (16 x 2).
=>
![mOxygen=32*1,52=48,64](https://tex.z-dn.net/?f=mOxygen%3D32%2A1%2C52%3D48%2C64)
g
The answer is nuclear fission. They use nuclear fission in the core of a nuclear reactor to heat up the water and the water from the core will be passed down to the heat exchanger and heat up other water sources. The water will be steamed and its steam will be converted into electricity.